question about correctly exporting point clouds

[adrianJW421]

I appreciate your wonderful work!! I have encountered some problems.

I prepared a custom video and extract the frames in it. I prepared dataset using

ns-process-data images --data chair --output-dir chair_out

and then train a nerf as below:

ns-train nerfacto --data chair_out colmap

In the viewer, I can see some correct rendered scene as below:

However, after the training is done, and I tried to export the point clouds with:

ns-export pointcloud \
            --load-config outputs/chair_out/nerfacto/2024-07-01_173121/config.yml \
            --output-dir exports/pcd/ \
            --num-points 1000000 \
            --remove-outliers True \
            --normal-method open3d \
            --save-world-frame True

and I get very strange results like this:

Could you please help me figure out what went wrong?